I have been observing experiments at SIGGRAPH several decades. Pixels resolution has gotten close to reality. Color systems like Samsungs are getting good. Six colors add some. What is really mindblowing is good dynamic range- capture bright light sources and deep shadows. A good HDR display starts to look like that desired window. Its not just the monitor. The full system requires a compatible camera and encoding protocol. The recently announced HDMI standard upgrade helps.